body,
html {
	margin: 0px;
	height: 100%;
}

.main {
	margin: auto;
	width: 100%;
	height: 93%;
}
.pjia{
	font-size: 16px;
	position: absolute;
	top: 20px;
	right: 100px;
}
.usericon img{
	border-radius: 25px;
	position: absolute;
	top: 5px;
	right: 20px;
	width: 50px;
	height: 50px;
}

.user{
	width: 100px;
	z-index:99999;
	position: absolute;
	top: 60px;
	right: 0;
	background: #1a1a1a;
	color: #666;
	display: none;
}

.user_course,.quit{
	height: 48px;
	line-height: 48px;
	text-align: center;
}
.quit:hover{
	color: #ddd;
}
.user_course:hover{
	color: #ddd;
}

.mulu {
	display: inline-block;
	height: 100%;
	vertical-align: middle;
	/*text-align: center;*/
	font-size: 16px;
	line-height: 60px;
	cursor: pointer;
	margin-left: 30px;
}

.mulu_detils {
	padding-bottom: 10px;
	overflow-y: scroll;
	position: absolute;
	top: 60px;
	left: 0;
	z-index: 1000;
	width: 300px;
	overflow-y: auto;
	font-size: 14px;
	background-color: #1a1a1a;
	color: #666;
	height: 92%;
	/*opacity: 0;*/
	display: none;
}


.course_titles :hover{
	color: #ddd;
	transition: all .2s;
}

.mulu_detils::-webkit-scrollbar {
	width: 10px;
	/*高宽分别对应横竖滚动条的尺寸*/
	height: 1px;
	background-color: #444;
}


/*定义滚动条轨道 内阴影+圆角*/

.mulu_detils::-webkit-scrollbar-track {
	-webkit-box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
	border-radius: 10px;
	background: #EDEDED;
}


/*定义滑块 内阴影+圆角*/

.mulu_detils::-webkit-scrollbar-thumb {
	border-radius: 10px;
	-webkit-box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
	background: #535353;
}


.big_title,
.small_title {
	line-height: 38px;
}

.coursetitle {
	height: 50px;
	overflow: hidden;
	font-size: 16px;
	padding: 5px;
	line-height: 48px;
	color: #ddd;
}

.big_title {
	padding-left: 20px;
}

.small_title {
	padding-left: 35px;
}

.header {
	width: 100%;
	height: 60px;
	background-color: #1d1d1d;
	text-align: left;
	color: #aaa;
	-webkit-user-select: none;
	user-select: none;
}

.header .title {
	left: 112px;
	top: 0;
	right: 280px;
	white-space: nowrap;
	display: inline-block;
	vertical-align: middle;
	font-size: 16px;
	text-indent: 22px;
	height: 60px;
	line-height: 60px;
	overflow: hidden;
	text-overflow: ellipsis;
	-webkit-user-select: text;
	user-select: text;
}